Hǎo de dǎoyǎn nénggòu diǎnshíchéngjīn, ràng pǔtōng yǎnyuán fāhuī chūsè.
A great director can turn stone to gold, bringing out excellent performances from ordinary actors.
Tips
culture
This idiom refers to the Taoist legend of the immortal who could touch a stone and turn it to gold. It parallels the Western concept of the Midas touch or the philosopher's stone.
memory
点 (touch/point) + 石 (stone) + 成 (become) + 金 (gold) — touch stone, become gold. Alchemical and magical in imagery.